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• lavu : add av_gettime_relative()

  12 mai 2014, par Olivier Langlois

  lavu : add av_gettime_relative()
  These functions are using the POSIX clock_gettime() function with the
  
  CLOCK_MONOTONIC clock id. If these are not present on the targeted
  
  platform, the new functions will fallback on using the original realtime functions
  
  av_gettime() and av_usleep().
  Monotonic support can be added on other platforms with their
  
  equivalent native system API eventually if possible.
  Whenever time is requested to measure relative time, the monotonic clock,
  
  when available, is superior to the system realtime clock because it is
  
  not affected by discontinuous jumps in the system time
  In a future step, offering the flexibility to let the user choose between
  
  rt and monotonic clock for avdevices packets will be investigated.
  It is very easy to experience the issues that this patch attempt to address
  
  by rewinding back in the past the system time while ffmpeg is running.
  this is breaking the ffmpeg report printing (ffmepg.c:print_report()) and
  
  the the rate emulator functionality (-re) without the patch.
  Signed-off-by : Olivier Langlois <olivier@trillion01.com>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] doc/APIchanges
  • [DH] libavutil/time.c
  • [DH] libavutil/time.h
  • [DH] libavutil/version.h

• lavc/qsvenc : use VBR if maxrate is not specified on Windows

  1er septembre 2022, par Haihao Xiang

  lavc/qsvenc : use VBR if maxrate is not specified on Windows
  Currently AVBR is disabled and VBR is the default method if maxrate is
  
  not specified on Linux, but AVBR is the default one if maxrate is not
  
  specified on Windows. In order to make user experience better accross
  
  Linux and Windows, use VBR by default on Windows if maxrate is not
  
  specified. User need to set both avbr_accuracy and avbr_convergence to
  
  non-zero explicitly and not to specify maxrate if AVBR is expected.
  In addition, AVBR works for H264 and HEVC only in the SDK.
  $ ffmpeg.exe -v verbose -f lavfi -i yuvtestsrc -vf "format=nv12" -c:v
  
  vp9_qsv -f null -
  

  • [DH] doc/encoders.texi
  • [DH] libavcodec/qsvenc.c
  • [DH] libavcodec/qsvenc.h
  • [DH] libavcodec/qsvenc_h264.c
  • [DH] libavcodec/qsvenc_hevc.c

• We are hiring engineers to build an awesome product and platform used by millions of people

  16 février 2016, par Piwik Core Team — Uncategorized

  Are you ready for a new challenge ? Or maybe you know someone who is looking for a change ? We have some exciting problems to solve and are looking for senior developers to work with us and our community on our open source Piwik Analytics platform. Piwik is used by more than one million websites all over the world. It is deployed on more than 300.000 servers and some users track more than 1 billion actions per month.

  What is it like to work on Piwik ?

  We develop this software using modern PHP, MySQL, Redis, AngularJS and more. We provide several kind of APIs and a plugin architecture to allow developers to extend and change Piwik to their needs. However, we would not be Piwik if we stopped at this point ! We want to turn Piwik into an even more awesome product and platform.
  You can imagine there is a lot to do and many challenges to face !

  While one part is to always make Piwik scale better and to improve UI and UX, we also want to provide simple APIs to make the life of developers as pleasant as possible. We aim to solve things the right way and our thousands of unit, integration, system, JavaScript and screenshot tests help us to innovate and to not be afraid of change. We like clean code and constant improvements.

  The Piwik team lives in New Zealand and Europe (Germany). We do the vast majority of our collaboration online. Our values include being open, transparent and sharing knowledge. For this we use tools like GitHub and Slack to communicate and Quake servers to take our minds off complex challenges. We are a small, flexible team, so when you come aboard, you will play an integral part in engineering and have a big impact on the product loved by so many people. You’ll help to create a welcoming environment for new contributors and set an example with your development practices and communications skills.

  Apply now, or spread the word !

  If you have strong skills in PHP send us an email with your CV and tell us a little about yourself and your experience in engineering complex applications.

  Apply for a job here http://piwik.org/jobs/ and if you’re maybe not the right candidate, contribute to the project by sharing this blog post and by sending it to your friends !